Streaming tool calls (#29179)

https://github.com/user-attachments/assets/7854a737-ef83-414c-b397-45122e4f32e8



Release Notes:

- Create file and edit file tools now stream their tool descriptions, so
you can see what they're doing sooner.

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>

Cargo.lock

@@ -7713,6 +7713,7 @@ dependencies = [
  "mistral",
  "ollama",
  "open_ai",
+ "partial-json-fixer",
  "project",
  "proto",
  "schemars",
@@ -9828,6 +9829,12 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "partial-json-fixer"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35ffd90b3f3b6477db7478016b9efb1b7e9d38eafd095f0542fe0ec2ea884a13"
+
 [[package]]
 name = "password-hash"
 version = "0.4.2"